95 research outputs found
Storyboardgraphy
Throughout the history of filmmaking, storyboarding has been used to pre-visualise films and help with production. Here I propose a new film visualisation tool to complement storyboarding, which I call ‘Storyboardgraphy’ and define as a ‘film pre- and post-visualization tool showing shot sizes and lengths along a timeline’. A storyboardgraphic consists of two axes, with the X-axis representing the scene timeline, the Y-axis the size of the shots, and the characters depicted as recognisable curves. Storyboardgraphy is an excellent way of visualising a) shot sizes/lengths in a simple graphic; b) shot pacing (changes in the lengths of shots over the film timeline); and c) the dynamic of shot sizes (the order of shots along the scene timeline), which are not easily perceived on a conventional storyboard. Therefore storyboardgraphy is of huge interest, not only for pre-visualisation and production, but also for post-visualisation when editing, teaching film-making and studying film
The threatening but unpredictable Sarcoptes scabiei: first deadly outbreak in the Himalayan lynx, Lynx lynx isabellinus, from Pakistan
Although neglected, the mite Sarcoptes scabiei is an unpredictable emerging parasite, threatening human and
animal health globally. In this paper we report the first fatal outbreak of sarcoptic mange in the endangered
Himalayan lynx (Lynx lynx isabellinus) from Pakistan. A 10-year-old male Himalayan lynx was found in a miserable
condition with severe crusted lesions in Chitral District, and immediately died. Post-mortem examination determined
high S. scabiei density (1309 mites/cm2 skin). It is most probably a genuine emergence, resulting from a new incidence
due to the host-taxon derived or prey-to-predator cross-infestation hypotheses, and less probable to be apparent
emergence resulting from increased infection in the Himalayan lynx population. This is an alarming situation for the
conservation of this already threatened population, which demands surveillance for early detection and eventually
rescue and treatment of the affected Himalayan lynxPeer reviewe
Patterns of helminth infection in Kenyan elephant populations
Background: The dynamics of helminth infection in African elephant populations are poorly known. We examined
the efects of age, sex, social structure and the normalized diference vegetation index (NDVI) as primary drivers of
infection patterns within and between elephant populations.
Methods: Coprological methods were used to identify helminths and determine infection patterns in distinct
elephant populations in Maasai Mara National Reserve, Tsavo East National Park, Amboseli National Park and LaikipiaSamburu Ecosystem. Gaussian fnite mixture cluster analyses of egg dimensions were used to classify helminth eggs
according to genera. Generalized linear models (GLM) and Chi-square analyses were used to test for variation in
helminth infection patterns and to identify drivers in elephant populations.
Results: Helminth prevalence varied signifcantly between the studied populations. Nematode prevalence (96.3%)
was over twice as high as that of trematodes (39.1%) in elephants. Trematode prevalence but not nematode prevalence varied between populations. Although we found no associations between helminth infection and elephant
social groups (male vs family groups), the median helminth egg output (eggs per gram, epg) did vary between social
groups: family groups had signifcantly higher median epg than solitary males or males in bachelor groups. Young
males in mixed sex family groups had lower epg than females when controlling for population and age; these differences, however, were not statistically signifcant. The average NDVI over a three-month period varied between
study locations. Cluster analyses based on egg measurements revealed the presence of Protofasciola sp., Brumptia
sp., Murshidia sp., Quilonia sp. and Mammomonogamus sp. GLM analyses showed that the mean epg was positively
infuenced by a three-month cumulative mean NDVI and by social group; female social groups had higher epg than
male groups. GLM analyses also revealed that epg varied between elephant populations: Samburu-Laikipia elephants
had a higher and Tsavo elephants a lower epg than Amboseli elephants.
Conclusions: Elephants had infection patterns characterized by within- and between-population variation in prevalence and worm burden. Sociality and NDVI were the major drivers of epg but not of helminth prevalence. Gastrointestinal parasites can have a negative impact on the health of wild elephants, especially during resource scarcity. Thus,
our results will be important when deciding intervention strategies.This research was funded by the Kenya Wildlife Service and the Department of Animal Pathology, Veterinary Faculty, University of Santiago de Compostela, Lugo, SpainS
A practical guideline to remote biopsy darting of wildebeests for genetic sampling
The use of biopsy darts for remote collection of tissue samples from free-ranging terrestrial and aquatic animal species has gained popularity in the recent past. The success of darting is very important since scientists may not have many chances to re-dart the same animal, especially with the free-ranging elusive wildlife species. We used wildebeest (Connochaetes taurinus) as a model to estimate the optimum shooting distance, pressure and the shot part of the body through which a researcher can optimize the success and amount of tissue collected from similar wild land mammalian species. Wildebeests were darted at six categories of distances ranging between 10 and 45 m and dart gun pressures of 5–14 millibar. The number of failed darts increased by increasing the darting distance: 0% (10 m), 0% (20 m), 6% (30 m), 20% (35 m), 71% (40 m), and 67% (45 m). There was a notable effect of the distances on the amount of tissue collected 20 m offered the best results. Dart gun pressure had no effect on the amount of tissue samples obtained. The amount of tissue obtained from successful darts was the same whether the animal was darted on the shoulder or thigh. In this paper, we present a practical guideline for remote biopsy darting of wildebeest to obtain optimum amount of tissue samples, which could be generalized for similar wild land mammalian species
Influence of Massive and Long Distance Migration on Parasite Epidemiology: Lessons from the Great Wildebeest Migration
First report of Setaria tundra in roe deer (Capreolus capreolus) from the Iberian Peninsula inferred from molecular data: epidemiological implications
Background
Filarioid nematode parasites are major health hazards with important medical, veterinary and economic implications. Recently, they have been considered as indicators of climate change.
Findings
In this paper, we report the first record of Setaria tundra in roe deer from the Iberian Peninsula. Adult S. tundra were collected from the peritoneal cavity during the post-mortem examination of a 2 year-old male roe deer, which belonged to a private fenced estate in La Alcarria (Guadalajara, Spain). Since 2012, the area has suffered a high roe deer decline rate (75 %), for unknown reasons. Aiming to support the morphological identification and to determine the phylogenetic position of S. tundra recovered from the roe deer, a fragment of the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene from the two morphologically identified parasites was amplified, sequenced and compared with corresponding sequences of other filarioid nematode species. Phylogenetic analyses revealed that the isolate of S. tundra recovered was basal to all other formely reported Setaria tundra sequences. The presence of all other haplotypes in Northern Europe may be indicative of a South to North outbreak in Europe.
Conclusions
This is the first report of S. tundra in roe deer from the Iberian Peninsula, with interesting phylogenetic results, which may have further implications in the epidemiological and genetic studies of these filarioid parasites. More studies are needed to explore the reasons and dynamics behind the rapid host/geographic expansion of the filarioid parasites in EuropeThis work was supported by the Programme for Consolidating and Structuring
Competitive Research Groups (GRC2015/003, Xunta de Galicia). Molecular
analyses were carried out in the LEM of EBD, CSIC and funded by RNM 118;
Junta AndaluciaS
Hidden MHC genetic diversity in the Iberian ibex (Capra pyrenaica)
[EN]Background: Defining hidden genetic diversity within species is of great significance when attempting to maintain the evolutionary potential of natural populations and conduct appropriate management. Our hypothesis is that isolated (and eventually small) wild animal populations hide unexpected genetic diversity due to their maintenance of ancient polymorphisms or introgressions. Results: We tested this hypothesis using the Iberian ibex (Capra pyrenaica) as an example. Previous studies based on large sample sizes taken from its principal populations have revealed that the Iberian ibex has a remarkably small MHC DRB1 diversity (only six remnant alleles) as a result of recent population bottlenecks and a marked demographic decline that has led to the extinction of two recognized subspecies. Extending on the geographic range to include non-studied isolated Iberian ibex populations, we sequenced a new MHC DRB1 in what seemed three small isolated populations in Southern Spain (n=132). The findings indicate a higher genetic diversity than previously reported in this important gene. The newly discovered allele, MHC DRB1*7, is identical to one reported in the domestic goat C. aegagrus hircus. Whether or not this is the result of ancient polymorphisms maintained by balancing selection or, alternatively, introgressions from domestic goats through hybridization needs to be clarified in future studies. However, hybridization between Iberian ibex and domestic goats has been reported in Spain and the fact that the newly discovered allele is only present in one of the small isolated populations and not in the others suggests introgression. The new discovered allele is not expected to increase fitness in C. pyrenaica since it generates the same protein as the existing MHC DRB1*6. Analysis of a microsatellite locus (OLADRB1) near the new MHC DRB1*7 gene reveals a linkage disequilibrium between these two loci. The allele OLADRB1, 187 bp in length, was unambiguously linked to the MHC DRB1*7 allele. This enabled us to perform a DRB-STR matching method for the recently discovered MHC allele. Conclusions: This finding is critical for the conservation of the Iberian ibex since it directly affects the identification of the units of this species that should be managed and conserved separately (Evolutionarily Significant Units).SIThis study was partially funded by the Consejería de Medio Ambiente of the Junta de Andalucía (projects 173/2009/M/00 and 03/15/M/00) and the Ministerio de Economía y Competitividad of the Spanish Government (projects CGL2012-40043-C02-01, CGL2012-40043-C02-02 and CGL2016-80543-P). The funding bodies did not contribute to the design of the study or collection, analysis and interpretation of data, or to the writing of the manuscript
Sarcoptic mange in wild ruminants in Spain : solving the epidemiological enigma using microsatellite markers
In Spain, sarcoptic mange was first described in native wildlife in 1987 in Cazorla Natural Park, causing the death of nearly 95% of the local native population of Iberian ibex (Capra pyrenaica). Since then, additional outbreaks have been identified in several populations of ibex and other wild ungulate species throughout the country. Although the first epizootic outbreak in wildlife was attributed to the introduction of an infected herd of domestic goats, the origin and the cause of its persistence remain unclear. The main aims of this study are to understand (i) the number of Sarcoptes scabiei " strains" circulating in wild ruminant populations in Spain, and (ii) the molecular epidemiological relationships between S. scabiei and its hosts. Ten Sarcoptes microsatellite markers were used to characterize the genetic structure of 266 mites obtained from skin scrapings of 121 mangy wild ruminants between 2011 and 2019 from 11 areas in Spain. Seventy-three different alleles and 37 private alleles were detected. The results of this study show the existence of three genetic strains of S. scabiei in the wild ruminant populations investigated. While two genetic clusters of S. scabiei were host- and geography-related, one cluster included multi-host mites deriving from geographically distant populations. The molecular epidemiological study of S. scabiei in wild ruminants in Spain indicates that the spreading and persistence of the parasite may be conditioned by host species community composition and the permissiveness of each host population/community to the circulation of individual "strains," among other factors. Wildlife-livestock interactions and the role of human-driven introduction or trade of wild and domestic animals should be better investigated to prevent further spread of sarcoptic mange in as yet unaffected natural areas of the Iberian Peninsula. The online version contains supplementary material available at 10.1186/s13071-021-04673-x
Sarcoptic mange: An emerging panzootic in wildlife
Sarcoptic mange, a skin infestation caused by the mite Sarcoptes scabiei, is an emerging disease for some species of wildlife, potentially jeopardizing their welfare and conservation. Sarcoptes scabiei has a near-global distribution facilitated by its forms of transmission and use of a large diversity of host species (many of those with broad geographic distribution). In this review, we synthesize the current knowledge concerning the geographic and host taxonomic distribution of mange in wildlife, the epidemiological connections between species, and the potential threat of sarcoptic mange for wildlife conservation. Recent sarcoptic mange outbreaks in wildlife appear to demonstrate ongoing geographic spread, increase in the number of hosts and increased virulence. Sarcoptic mange has been reported in at least 12 orders, 39 families and 148 species of domestic and wild mammals, making it one of the most generalist ectoparasites of mammals. Taxonomically, the orders with most species found infested so far include Perissodactyla (67% species from the entire order), Artiodactyla (47%), and Diprotodontia (67% from this order). This suggests that new species from these mammal orders are likely to suffer cross-species transmission and be reported positive to sarcoptic mange as surveillance improves. We propose a new agenda for the study of sarcoptic mange in wildlife, including the study of the global phylogeography of S. scabiei, linkages between ecological host traits and sarcoptic mange susceptibility, immunology of individuals and species, development of control strategies in wildlife outbreaks and the effects of global environmental change in the sarcoptic mange system. The ongoing transmission globally and sustained spread among areas and wildlife species make sarcoptic mange an emerging panzootic in wildlife. A better understanding of sarcoptic mange could illuminate the aspects of ecological and evolutionary drivers in cross-species transmission for many emerging diseases.This research was supported by the Australian Research Council Linkage Program (LP180101251) to Scott Carver. Luis Escobar was supported by the Global Change Center and the Center for Emerging, Zoonotic, and Arthropod-borne Pathogens at Virginia Tech. Any use of trade, firm or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Peer reviewe
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